Updated 08/27/13 – 7:46 a.m.

(CBS) – Some schools in Chicago and the suburbs are scaling back classes Tuesday because of expected high temperatures and humidity.

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The most sweeping adjustment is at School District 129 in West Aurora, which is sending most students home early after only a half-day, officials announced. Officials released a schedule of dismissals that will occur, from earliest to latest:

— 10:40 a.m. for high school (practices will be held immediately after)

—  11 a.m., Todd Early Childhood Center; no afternoon pre-school

—  11 a.m., Hope Wall pre-school; no afternoon pre-school

—  11:20 a.m., elementary schools and Hope Wall School

—  Noon — middle schools (no after-school athletic practices or events).

Special-education private placement students will be on their regular schedule and will not have an early release, District 129 said. The evening Success Academy (at West High) will remain on its regular schedule, and sack lunches will be provided.

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The district’s communications director says fans, dumpster rental and bottled water can only do so much.

“We’re all about teaching and learning, but at some point you can’t do much teaching and there isn’t much learning going on because of the heat,” Mike Chapin tells CBS 2’s Brad Edwards.

The district will monitor the weather the rest of the week, in case early-release days are scheduled. For more information, click here.

Also Monday, Waukegan Public Schools announced it was shaving up to 50 minutes off of the school day on Monday and Tuesday, also because of the heat.

Taft School District 90 in Lockport plans to dismiss classes at 1:30 p.m. Tuesday, the district announced. In Chicago, Josephinum Academy planned to close at noon, according to the private school’s website.

Temperatures could reach about 95 degrees on Tuesday, and when combined with the humidity, it could feel as hot as 103 degrees.

Temperatures are expected to dip back into the 80s later in the week, but it will still feel hot, and the mercury will climb back into the 90s for the start of the Labor Day weekend.

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Get the latest on school closings or early dismissals here.